Search and rescue workers in the city told Vietnam News Agency that the tropical depression � remnants of the weakened Typhoon Toraji �had produced total rainfall of 380mm in less than 12 hours.

With the city's sewage system unable to handle the prolonged downpour, many parts of the city were flooded.

At least 1,400 people living in high-risk mountainous areas in Phu?c A�?ng Commune were moved to safer ground after four persons � including a 14-year-old child � were buried in a landslide.

In the morning, 400 soldiers and officials from various military universities based in the city were mobilised to support search and rescue agencies.

In the early morning, an international flight destined for Nha Trang was forced to land at HCM City instead due to the weather.

Heavy rainfall also hindered traffic between Nha Trang and Cam Ranh International Airport.

VA Anh Ki?t, deputy director of the South Central Meteorology Hydrography Station (based in Nha Trang), said the rainfall had exceeded forecasts.

Another tropical depression was currently forming off the coast of the Philippines and was likely to become the ninth typhoon to enter Vi?t Nam's East Sea (internationally known as South China Sea) this year, Ki?t said, adding that there was a strong possibility that the typhoon would make landfall in the south-central and southern provinces in a week.

A�A�o CAng ThiA�n, vice chairman of Khanh HoA�'s People's Committee, said the landslide-hit locations were in areas difficult to access, so victims were at risk of being isolated despite ramped up efforts by search and rescue forces.

Vice Chairman ThiA�n said that the People's Committee had directed local governments to expedite support and aid for the victims.

Leaders would be held accountable before the provincial People's Committee and Party Committee if support was delayed.

Schools would be closed Monday, Nha Trang's education department said, with HCM City likely following suit depending on developments as the tropical depression had been forecast to move towards the southern city.

The south-central province of Ninh Thu?n also reported rampant flooding from the depression, with Phu?c Nam Commune in Thu?n Nam District being the hardest hit.

The inter-commune road was under half a metre of floodwater, effectively cutting off access while schools, markets, medical stations and several houses inundated.

Canoes were deployed to transport 73 households in the flooded areas to safer locations.

No casualties had been reported, however.

Early morning on Sunday, a tornado occurred in GA�nh A�a A�ia (The Cliff of Stone Plates) area, a popular sightseeing site in An Ninh A�Ang Commune, PhA� YA�n Province, injuring 19 tourists from HCM City and four locals, while damaging several houses in the area.

Another tornado was also reported in HoA� TAm Commune in PhA� YA�n that took down power lines and damaged many houses.

Water levels in rivers from Khanh HoA� to Ninh Thu?n are on the rise, leaving more areas in the south central region at risk of flooding and landslides even when the rains have stopped.